Hot-air smoke-consuming furnace.



PATENTBD JUNE 2, 190s. 1 F. FISHER. HOT AIR SMOKE coNsUMING FURNAGB.

APPLICATION FILED MAY 1B, 1907.

`the furnace.

FRANKl FISHER, OF DES MOINES, IOWA.

HOT-AIR SMOKE-CONSUMING FURNACE.

Application filed May 18, 1907.

Specification of Letters Patent.

Patented June 2, 1908.

Serial No. 374,518.

To all whom it may concern:

Be it known that I, FRANK FISHER, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented a new and useful Hot- Air Smol e-Consuming Furnace, of which the followingis a specification.

My object is first, to provide an improved down draft hot air furnace to prevent the waste of valuable products of combustion and the annoyances incident to black smoke and soot. Second, to provide an enlarged combustion chamber and combine means therewith for regulating the passage of the products therethrough by' a person in front of Third, to increase the radiating surface and to prevent theescape of heat through a pipe into the chimney with which it may be connected.

My invention consists in the construction, arrangement and combination of parts as hereinafter set forth, pointed out in my claims and illustrated in the accompanying drawings, in which 1- Figure 1 is a top view vthat shows how the radiating surface is increased within the hot air chamber by means of a pipe on top of the combustion chamber. Fig. 2 is a vertical sectional view that shows the position of the dierent operative parts relative to each other and the furnace walls.

The letter A designates the wall which is preferably brick and square.

The base and ash pit is designated by the numeral 10 and above the ash pit and at its rear portion is `a grate 12, and above the grate is the fire pot and combustion chamber 13. A door 14, is in front of the ash pit. A door way 15 provided with a door 16 and an air register c admits air into the fire pot 13 whenever desired 4for promoting combustion.

At the rear of the fire pot 13 is an extension 17 for supporting a pipe 18 and between the pipe 18 and the fire pot 13 is a pipe 19 that as an elbow 2O at its top that is connected with the to portion of the combustion chamber 21 as s own in Fig. 2, or in any suitable way as required for directing the products of combustion alternately upward and downward in the combustion chamber. In the pipe 19 is a damper 22 and a rod 23 extends forward therefrom for operating it. An opening 24 at the bottom of the fire pot 13 allows the products of combustion to pass rearwards and then upward in the pipe 18.

fender 25 extends down and forwards from the pipes 18 and 19 to coact with the damper 22 in the pipe 19 and reduces the passageways to both of said pipes to aid in control* ling and directing the products of combustion relative thereto. The rear wall of the ash pit 10 has an upward and rearward extension 26 and a corresponding opening at its top in which opening is hinged a door 27 that is provided with a rod b that extends forwards at the outside of the fire ot 13, as shown in Fig. 1, for operating the oor as required for cleaning the extension 17 whenever necessary.

A radiator pipe 28 on top of the combustion chamber is supported by'brackets 29 fixed to the combustion chamber in any suitable way and is connected with the top of the pipe 18. A damper 3() in the pipe 28 has a rod 31 extending forward and through an aperture in the wall A for operating the damper 30 as required for controlling the passage of products of combustion through the radiator pipe thus combined with the furnace as shown in Fig. 2.

Having thus set forth the purposes of my invention and the construction, arrangement and combination of the different parts the practical operation and utility thereof will be obvious.

What I claim as new and desire to secure by Letters-Patent, is

1. In a furnace, a fire pot having a combustion chamber on its top, an extension and passageway for products of combustion in the rear and lower portion of the fire pot extending rearwards, a pipe connected with the rear end of said passageway projecting upwards, a second pipe projecting upward from Said passageway and communicating with the combustion chamber, a damper in said pipe, and a fender extending downward and forward from the top of the extension and rear passageway, to operate as set forth.

2. In a furnace, a fire pot having a combustion chamber on its top, an extension and passageway for products ofcombustion in the rear and lower portion of the fire pot extending rearwards, a pipe connected with the rear end of said passageway projecting upwards, a second pipe projecting upward from said passageway and connected with the combustion chamber, a fender extending downward and forward from the top of the extension and rear passageway anda damper in the second pipe, a radiator pipe on top of the combustion chamber communicating with Athe pipe projecting upward from the passageway at the lower portion of the fire pot, to operate as set forth.

3. In a furnace, a fire pot, a grate under the fire pot, a passageway for products of combustion in rear of the combustion chamber and grate, a pipe communicating with said passageway and the upper portion of the combustion chamber and a fender in the said passageway, to operate as set forth.

4. A furnace comprising a fire pot having a combustion chamber on its top, a grate, an extension and passageway for products of combustion in the rear of the grate and lower portion of the fire pot extending rearwards, a pipe connected with the rear end of said passageway projecting upwards7 a second pipe projecting upward from said passageway and connected with the combustion chamber, a fender extending downward and forward from the top of the extension and rear passageway and a damper in the second pipe, a radiator pipe on top of the combustion chamber communicating with the pipe projecting upward at the lower portion of the fire pot, a damper in the radiator pipe and a hinged door in the bottom of the rear extension and passageway, to operate as set forth.

FRANK FISHER. Witnesses:

R. H. ORWIG, THOMAS G. ORWIG. 

